Saw-set.



No. 629,1'5l. Patented July 18, I899.

' n. CAMPBELL.

SAW SET.

(Application filed Feb. 35, 1899.) I (No l ndol.) 2 Sheets-Sheet I.

WITNESSES INVENTOR ATTOBNEYJ'.

THE uonms Prrcas cu. Pumumu. wwnlusrou. n c.

UNITED STATES.

PATENT 'OFFIcE.

nnin-Josnrn CAMPBELL, OF ALBANY, NEW YORK.

SAW-SET.

SPECIFICATION formingpart of Letters Patent No. 629,151, dated July 18,1899.

Application filed February 25, 1899. seatin 706,760. on model.)

the following is a full and complete specifica-- tion,such as willenable those skilledin the art to which it appertains to make and usethe same.

This invention relates to saw-sets, and has more particular reference toa portable device of this class of compact form and rigidity andautomatic action.

Reference is made to the accompanying drawings, forming part of thisspecification, in which like figures refer to like parts in the severalviews, and in which- Figure 1 is a side elevation of a saw-setembodyingmyimproved construction; Fig. 2, a plan view thereof; Fig. 3, arear end elevation thereof ,Fig. 4, apartial section through. Fig. 2upon the line at 4, and Fig. 5 is a face view of the set-punch employed.

Referring more particularly'to the drawings, 6 is a base or bed plateprovided witha front member 6 rigid metal, forming a firm base for thesetarm and operative construction about to be described. The base 6 isprovided with a plurality of countersunk screw-holes 7, by which it maybe attached to a bench or other support. The rear portion 6 of the base6 is provided with an elevated portion or standard 8, which is composedof two members 8 and 8 as shown in Figs. 2 and 3, and between saidstandard members is pivoted the rear end of an arched set-arm 9, apivot-pin 10 passing. through said standard members and said set-' arm.A band-spring 11, the lower end" ofwhich is coiled about a pin 12,passing through the lower portions of the standard members 8 and 8,describes a broad rearward curve and engages at its upper end a shoulder9, formedupon the rear end porti'onof the setarm 9, as shown'in Figs. 1,2, and 3, and the function ,of the spring 9 is to. exert a depressingforce upon the forward or operative end of the'set-arm 9. Likewisepivoted between the standard members 8 and 8 is a triggershoulder 14,and trigger-arm 12 is swung rearwardly the set largement or lug 15,

and a rear member 6 and'iscomposed, preferably, of iron, steel, or any.

"the projection 6.

I arm 12, mounted laterally of the set-arm 9 and upon the pivot-pin 10,the V13 thereof being elongated, as shown 1H dotted lines in Fig. 1,-and the object of the elon- "gation of the hole 13 is toallow of radialplay .ofthe arm12.

The set-arm 9 is transversely grooved-: in the upper rearv portionthereof, forming a shoulder 14 forward of the shoulder 99. Thetrigger-arm 12 is provided at the side adjacent the set-arm9 with aprojecting pin 12 (best seenin Fig. 2,) and the pin 12 is adapted tooperate in connection with the by means thereof when the arm 9 will beraised against the elasticity of the spring 11. The trigger-arm 12 isalso provided upon its inner end portion with an en- (best seen in Fig.3,) and atrip-screw 16 passes therethrough,said screw and lug beingsimilarly threaded,and is adapt- ,ed to operate in connection with ashoulder '17, formed upon the adjacent member of the standard 8, asshown at 8 in the drawings.-

It is evident that when the trigger-arm 12 is "rearwardly depressed,raising the set-arm 9, "as described, at a given point in its path ofmovement, the trip-screw 16 will engage the shoulder 17 the trigger-arm12 will be radially projected, and the spring 11 will depress theforward or operative end of the set-arm 9. The forward member 6 of thebase 6 is provided with a forwardly and downwardly pro;

jecting integral portion 6, and at the point of junction of saidprojection and the horizontal base member 6 a solid anvil or disk 18 isset thereinto, and the disk 18 is beveled in its upper surfacetocoincide rearwardly with the upper surface of the base member 6 andforwardly with the upper surface of The anvil 18 is preferably composedof hardened machine-steel. A setpunch 19 is set into the lower portionof the forward end of the set-arm 9 and detachably secured therein byaset-screw 20. A face view of the punch 19 is shown in Fig. 5, the loweror operative surface thereof being raised centrally and V-shaped inhorizontal cross-section. The punch 19 is adapted to operate inconnection with the anvil 18.

A cross-arm 21 is secured transversely of the base 6 by means of aset-screw 22, as

pivot-pin opening I shown in Fig. 4, and the cross-arm is provided witha transverse elongated slot through which said screw 22 passes, and bymeans of which slot and screw it may be adjusted longitudinally of thebase 6. The cross-arm 21 is recessed centrally of the forward edge thereof adjacent the anvil 18, as shown at 23 in dotted lines in Fig. 2.Laterally of thebase 6 the cross-arm 21 is formed at an angle to thehorizontal equivalent to the pitch of the base projection 6 and isprovided in each of its outer end portions with a pair of studscrews 2424, about each of which is mounted a revoluble drum or collar 25, (shownin dotted lines in Fig. 2,) and above each collar and surrounding eachscrew 24 is mounted a washer 26, held in position by the head of thescrew 24. About each pair of collars 25 25 is passed a continuous rubberband 27, and by means of the collars 25 the bands 27 are revoluble aboutthe screws 24. Saw-guides 28 are secured one to either end portion ofthe cross-arm 21, and each comprises a flat base portion and a forwardportion projecting upwardly at right angles therewith, and the fiat baseportion is slotted longitudinally to receive the lower end of a screw24, and the saw-guide 25 may be adjusted upon said screw by means ofsaid slot, which is elongated and is shown in dotted'lines at 29, Fig.1, and secured in any adjusted position by means of a nut 30.

The saw-blade is designed to be placed upon the base projection 6 thetoothed portion resting upon the guides 28, the teeth resting againstthe rubber bands27, the tooth to be set resting upon the anvil 18 andprojecting into the recess 23 of the cross-arm 21. An adj listing-screw31 passes through an opening in the outer end of the base projection 6,which is similarly threaded, and by means thereof the pitch or angularposition of the saw-blade with relation to the horizontal surface of theanvil 18 may be regulated and the set of the saw determined.

The operation of my device will be evident from the foregoingdescription, when taken in connection with the accompanying drawings andthe following statement thereof.

The blade of the saw to be set is placed upon the projection 6 of thebase 6 and the guides 28, the teeth thereof resting against the bands27, and one tooth at a time may be brought into position over the anvil18. With a saw-tooth so placed the trigger-arm 12 is rearwardlydepressed, the pin 12 engaging the shoulder 14, and the set-arm 9 israised against the elasticity of the spring 11. Then the arms 9 and 12have been pivotally swung to such a point as shall bring the tripscrew 9into engagement with the shoulder 17, the trigger-arm 12 will begin tomove radially as well as pivotally, due to the formation of thepivot-hole 13 of the arm 12, and when this radial motion has continuedto such an extent as to withdraw the pin 12 from engagement with theshoulder 14, the set-arm will be released, and the spring 11 willdepress the set-arm 9, bringing the punch 19 into engagement with saidsaw-tooth, and setting the same upon the anvil 18. This operation iscontinued, moving the saw laterally of the saw-set device to the extentof one tooth for each blow of the set-arm 9, or as many blows asrequired to set each saw-tooth. The revoluble rubber bands 27 willprotect the teeth edges, and the guides'2S keep the saw-blade in properposition. The trip-screw 16 may be adjusted to produce blows of varyingforce by the set-arm 9.

It is evident that many changes may be made in the construction andarrangement of the parts of my device, and I claim all such as comewithin the scope of my invention.

Having fully described my invention, I claim as new and desire to secureby Letters Patent I 1. In a device of the class described, a baseportion provided with an anvil in the front portion thereof, aspring-actuated set-arm provided with a punch and pivotally mounted inconnection with the rear portion thereof, a trigger-arm pivotallymounted in connection with said base portion adjacent said set arm, andprovided with an elongated pivot-opening by means of which it isradially movable, and having a projection, a shoulder being formed uponsaid set-arm, which said projection is adapted to engage to elevate saidset-arm, and an adjustable screw secured to said trigger-arm and whichis adapted to engage said base portion in the down ward movement of saidtrigger-arm to cause radial movement thereof and to withdraw saidprojection from engagement with said shoulder, substantially as shownand described.

2. In a device of the class described, a base, a spring-actuated set-armconnected pivotally with said base and provided with a punch, atrigger-arm pivotally mounted adjacent to said set-arm, and providedwith means for engaging said set-arm, a trip-screw connected with saidtrigger-arm and adapted to engage said base to withdraw said means fromsaid set arm, substantially as shown and described.

3. In a device of the class described, a base provided with an inclinedprojection, an anvil mounted in said base and in said projection at thejunction thereof, an adjusting-screw passing operatively through saidbase projection and adapted to regulate the set of a saw and a cross-armmounted transversely of said base and provided at each end portion witha pair of revolubly-mounted drums, and a flexible band passed revolublyabout each pair of drums, and with a saw-guide secured to each endportion of said cross-arm and comprising an angular plate adjustablysecured thereto, substantially as shown and described.

4. In a device of the class described, a base, a cross-arm adj ustablymounted thereon and provided at each end portion with a pair ofstud-screws, a collar revolubl y mounted upon each of said screws, aflexible band passed revolubly about said comprising two angular platesadj ustably secured to the under side of said cross-arm by means of thelower end of said stud-screws which pass through an elongated opening ineach, and a nut fitting each of said screws and adapted to lock saidsaw-guide in adjusted position, substantially as shown and described.

5. In a device of the class described, a base, a cross-arm adj ustablymounted thereon and provided at each end portion with a saw-guidecomprising an angular plate, adjustably secured to the said cross-armand adapted to engage the under face of a saw to be set, stantially asshown and described.

6. In a device of the class described, a base, a cross-arm mountedthereon and provided at each end portion with a pair of Vrevolublymounted collars, and a flexible band passed suboollars, and asaw-guide from operative engagement with said set-arm,

substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname, in presen'ce of the subscribing witnesses,this 18th day ofFebruary, l899.

NEIL JOSEPH CAMPBELL.

Witnesses MARTIN J. GALLERY, J r., EDWARD McDoNALD.

